import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import { baseUrl } from "@/config";

// create an axios instance
const service = axios.create({
	baseURL: baseUrl, // url = base url + request url
	// withCredentials: true, // send cookies when cross-domain requests
	timeout: 1000 * 60 * 5// request timeout
})

// request interceptor
service.interceptors.request.use(
	config => {
		let option = ''
		if (config.params) {
			option = 'params'
		} else {
			option = 'data'
		}
		// do something before request is sent
		config.headers['api-name'] = encodeURIComponent(config.apiName || '未知')
		if (store.getters.token) {
			// let each request carry token
			// ['X-Token'] is a custom headers key
			// please modify it according to the actual situation
			config.headers['Authorization'] = getToken()
		}
		//处理数据
		// 参数为空是否删除
		if (!config.isNotNull) {
			for (let i in config[option]) {
				// 去除空格
				if (typeof config[option][i] === 'string') {
					config[option][i] = config[option][i].trim()
				}
				// 空值移除
				if (!config[option][i] && config[option][i] !== 0 && typeof config[option][i] !== 'boolean') delete config[option][i]
				// 去除所有$开头字段
				if (/^\$/.test(i)) delete config[option][i]
			}
		}
		return config
	},
	error => {
		// do something with request error
		console.log(error) // for debug
		return Promise.reject(error)
	}
)

// response interceptor
service.interceptors.response.use(
	/**
	 * If you want to get http information such as headers or status
	 * Please return  response => response
	 */

	/**
	 * Determine the request status by custom code
	 * Here is just an example
	 * You can also judge the status by HTTP Status Code
	 */
	response => {
		const res = response.data

		// if the custom code is not 20000, it is judged as an error.
		if (res.code !== 200) {
			Message({
				message: `${res.code} : ${res.msg.toString() || 'Error'}`,
				type: 'error',
				duration: 5 * 1000
			})

			// 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
			if (res.code === 500) {
				// to re-login
				MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
					confirmButtonText: 'Re-Login',
					cancelButtonText: 'Cancel',
					type: 'warning'
				}).then(() => {
					store.dispatch('user/resetToken').then(() => {
						location.reload()
					})
				})
			}

			return Promise.reject(new Error(res.message || 'Error'))
		} else {
			return res
		}
	},
	error => {
		console.log('err' + error) // for debug
		const { msg, code } = error.response.data
		Message({
			message: `${code} : ${msg.toString() || 'Error'}`,
			type: 'error',
			duration: 5 * 1000
		})
		if (code === 401) store.dispatch('user/resetToken')

		return Promise.reject(error)
		// return Promise.resolve(error)
	}
)

export default service
